(1-to-1) DVD/CD Duplicator - 20x DVD R Burn/8X DVD+RW/8X DVD+R DL/6X DVD-RW/48X CD-R/32X CD-RW.
Vaginal infections are a very common cause for the pH of the vagina to rise. The most common vaginal infection in my practice (and in all doctor's offices) is Bacterial Vaginosis which causes the normal vaginal pH to rise to above 4.5. Odor usually occurs with Bacterial Vaginosis.
Another factor which affects the pH is the amount of plant growth and organic material within a body of water. When this material decomposes carbon dioxide is released. The carbon dioxide combines with water to form carbonic acid. Although this is a weak acid, large amounts of it will lower the pH.